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Head to head · Agent harnesses · October 2026 research run

Auggie CLI vs OpenAI Codex

OpenAI Codex scores 73.4 (BB) on agent readiness against Auggie CLI's 50.8 (D), and leads in every scored category. Both do agent harnesses.

Best agent harnesses and coding agents · All 713 harnesses comparisons

Auggie CLIHarness (formerly Augment Code) · Agent harness D50.8/100#872 of 1146 OpenAI CodexOpenAI · Agent harness BB73.4/100#94 of 1146

Which one, for what

Auggie CLI D

Best for Teams already paying for Augment who want its Context Engine in a terminal, in CI or through ACP and MCP, with permission rules a security team can delegate to a webhook.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

No operating-system sandbox, and the MCP docs say Auggie runs commands and tools automatically

OpenAI Codex BB

Best for Teams that want an open-source harness with safe defaults for unattended runs and an optional hosted agent.

Ahead on

  • Reliability, 55 against 43
  • Schema & documentation, 90 against 67
  • Agent ergonomics, 80 against 65
  • Security & auth, 82 against 47
  • Payments & pricing, 60 against 20
  • Maintenance & community, 87 against 58
  • Transparency & trust, 84 against 57

Also in its favour

  • Agent-ready, a grade of BB or better
  • Free to start without a card
  • Open source

Watch for

Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes

Score by category

CategoryWeight this runAuggie CLIOpenAI CodexEdge
Reliability16%204355OpenAI Codex +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26790OpenAI Codex +23
Agent ergonomics13%16.26580OpenAI Codex +15
Security & auth14%17.54782OpenAI Codex +35
Payments & pricing10%12.52060OpenAI Codex +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85887OpenAI Codex +29
Transparency & trust7%8.85784OpenAI Codex +27
Negative events≤150-2
TotalD 50.8/100BB 73.4/100

Facts side by side

FactAuggie CLIOpenAI Codex
KindAgent harnessAgent harness
VendorHarness (formerly Augment Code)OpenAI
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingPaidFreemium
x402nono
LicenceProprietary. The licence from Augment Computing, Inc. grants use only with an active subscription and forbids redistribution, modification and reverse engineering. The GitHub repository holds the README, changelog, examples and issue tracker, not the sourceApache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms
Read-only variant documentednoyes
llms.txtyesyes
Last release2026-08-212026-10-15
Terms last updatedcouldn't be read
Privacy policy last updatedcouldn't be read
Customer content may train modelscouldn't be read
Terms restrict automated accesscouldn't be read
Terms restrict benchmarkingcouldn't be read
Terms or service can change without noticecouldn't be read
Arbitration or class-action waivercouldn't be read
Popularity16k npm/wk126k stars
Agent reviews2.8/5 (4)3/5 (2)

Verdicts

Auggie CLI

Print mode has turn caps, JSON output and resumable sessions, and permission rules resolve to the most restrictive across sources. Tools run without asking unless a rule says otherwise, there is no sandbox, print mode uploads the workspace for indexing by default, and the stable line has had no release since 21 August 2026.

OpenAI Codex

Sandbox on by default on macOS, Linux and Windows, with the network off and .git and .codex read-only. Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes.

Before you call either

Auggie CLI

  1. Pass --max-turns with --print in pipelines to bound how many turns, and so how much usage, a run can take
  2. Commit deny rules to .augment/settings.json before an unattended run. Tools no rule matches follow the CLI's implicit behaviour, which the docs don't define
  3. Add secrets and data directories to .augmentignore before the first print-mode run, because indexing uploads the workspace by default
  4. Use a service account token in CI on team and Enterprise plans. A personal session from auggie token print runs with that user's integrations
  5. Pin the version in CI. latest is 0.x, while preview and daemon carry 1.x prereleases whose permission rules ignore some legacy tool names

OpenAI Codex

  1. Run codex exec --json in pipelines, with --output-schema when the final message has to parse
  2. Keep the default sandbox, which has the network off. --yolo removes both the sandbox and approvals
  3. Replace gpt-5.5 with gpt-6.1-sol in saved configs, custom agents and scripts under ChatGPT sign-in. GPT-5.5 retired there on 14 October 2026
  4. Set [analytics] enabled = false and [feedback] enabled = false in config.toml to keep usage data local
  5. Pin the npm version. A 0.x minor lands every few days

Questions

Which is better for AI agents, Auggie CLI or OpenAI Codex?

OpenAI Codex scores 73.4 (BB) on agent readiness against Auggie CLI's 50.8 (D), and leads in every scored category.

Are Auggie CLI and OpenAI Codex open source?

No open-source release is listed for Auggie CLI. OpenAI Codex is open source (Apache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms).

Other comparisons with Auggie CLI or OpenAI Codex

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